Apologies that it has taking me so long to respond. ☺️
The OEM/Prodrive is definitely a better quality product than the WinAce alternative. (That is hardly surprising considering that WinAce manage to develop this early version of their bootlid from photos alone. ISTR that they released it at the same time that the 410 was announced). FWIW, IaSTR that Prodrive weren’t the original OEM manufacturers of the CF bootlid. That was Polar Manufacturing in Wymondham.
The ‘lid itself was installed by the Beaconsfield Workshop so I wasn’t in a position to weigh the respective lids off the car. However, from opening the boot, it is obvious that the CF ‘lid is lighter than the GRP one (as expected). However, the GRP ‘lid does use some of the accessories from the original bootlid (such as the leather trim piece and the oleos) so the extra weight might be in there.
However, the rear visibility has been improved with the OEM ‘lid. The slats are thinner on the CF version so you can see a bit more out via rear view mirror.
I also ordered the additional fitting kit so it has the little rod as found in the 410 cars. There was some drilling required to fit it and the plugs on the electrical harnesses also had to be changed.
Don’t forget that you also need to order a new high level brake light. The GRP ‘lid used the original version; the CF ‘lid needs the 4XX version.